Add full AARS system - Attendance & Accident Record System

- FastAPI backend with SQLite database
- React + TailwindCSS frontend
- JWT authentication
- Excel upload/download for attendance and accident records
- Shift roster management with S7a/S7b split
- Lateness/OT calculation based on shift times
- Roster info API endpoints
- Export API with token query parameter support
- Docker compose deployment

backend/models.py

@@ -0,0 +1,94 @@
+from sqlalchemy import Column, Integer, String, Text, Float, Boolean, DateTime, Date, Time, JSON, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from database import Base
+from datetime import datetime, timezone
+
+
+def now_hkt():
+    """Return current time in HKT timezone."""
+    return datetime.now(timezone.utc)
+
+
+class User(Base):
+    __tablename__ = "users"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String(255), unique=True, index=True, nullable=False)
+    password_hash = Column(String(255), nullable=False)
+    name = Column(String(255), nullable=False)
+    role = Column(String(50), default="user")  # admin, user
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=now_hkt)
+    updated_at = Column(DateTime, default=now_hkt, onupdate=now_hkt)
+    deleted_at = Column(DateTime, nullable=True)
+
+
+class Attendance(Base):
+    __tablename__ = "attendance"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    employee_id = Column(String(100), index=True, nullable=False)
+    employee_name = Column(String(255), nullable=False)
+    department = Column(String(100), index=True)
+    date = Column(Date, nullable=False)
+    check_in = Column(Time, nullable=True)
+    check_out = Column(Time, nullable=True)
+    overtime_hours = Column(Float, default=0)
+    leave_type = Column(String(50), nullable=True)  # annual, sick, unpaid, other
+    leave_hours = Column(Float, default=0)
+    status = Column(String(50), nullable=False)  # present, absent, late, leave
+    remarks = Column(Text, nullable=True)
+    custom_fields = Column(JSON, default={})
+    created_by = Column(Integer, ForeignKey("users.id"))
+    created_at = Column(DateTime, default=now_hkt)
+    updated_at = Column(DateTime, default=now_hkt, onupdate=now_hkt)
+    deleted_at = Column(DateTime, nullable=True)  # Soft delete
+
+
+class Accident(Base):
+    __tablename__ = "accidents"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    date = Column(Date, nullable=False)
+    time = Column(Time, nullable=True)
+    location = Column(String(255), nullable=False)
+    employee_name = Column(String(255), nullable=False)
+    employee_id = Column(String(100))
+    department = Column(String(100))
+    description = Column(Text, nullable=False)
+    severity = Column(String(50), nullable=False)  # minor, moderate, serious, fatal
+    medical_report = Column(Text, nullable=True)
+    action_taken = Column(Text, nullable=True)
+    responsible_person = Column(String(255), nullable=True)
+    custom_fields = Column(JSON, default={})
+    created_by = Column(Integer, ForeignKey("users.id"))
+    created_at = Column(DateTime, default=now_hkt)
+    updated_at = Column(DateTime, default=now_hkt, onupdate=now_hkt)
+    deleted_at = Column(DateTime, nullable=True)  # Soft delete
+
+
+class AttendanceCustomField(Base):
+    __tablename__ = "attendance_custom_fields"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    field_name = Column(String(100), nullable=False)
+    field_type = Column(String(50), nullable=False)  # text, number, date, select
+    field_key = Column(String(100), unique=True, nullable=False)
+    required = Column(Boolean, default=False)
+    options = Column(JSON, default=[])  # For select type
+    order = Column(Integer, default=0)
+    created_at = Column(DateTime, default=now_hkt)
+
+
+class AccidentCustomField(Base):
+    __tablename__ = "accident_custom_fields"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    field_name = Column(String(100), nullable=False)
+    field_type = Column(String(50), nullable=False)  # text, number, date, select
+    field_key = Column(String(100), unique=True, nullable=False)
+    required = Column(Boolean, default=False)
+    options = Column(JSON, default=[])  # For select type
+    order = Column(Integer, default=0)
+    created_at = Column(DateTime, default=now_hkt)